Kondo Effect with Weyl Semimetal Fermi Arcs

TL;DR

This paper explores the Kondo effect in Weyl semimetal Fermi arcs, revealing anisotropic spin correlations influenced by nontrivial spin textures and chemical potential tuning.

Contribution

It provides the first detailed analysis of the Kondo effect on Fermi arcs in Weyl semimetals, highlighting anisotropic spin correlations and their dependence on chemical potential.

Findings

Correlation functions show high anisotropy and symmetry matching spin texture.

Tuning chemical potential alters correlation patterns and length.

Discrepancies found between Weyl and Dirac semimetal Fermi arc correlations.

Abstract

We investigate the Kondo effect of the Fermi arcs in a time-reversal-invariant Weyl semimetal with the variational method. To show the consequence brought out by the nontrivial spin texture, we calculate the spatial spin-spin correlation functions. The correlation functions exhibit high anisotropy. The diagonal correlation functions are dominated by the antiferromagnetic correlation while the off-diagonal part has more complicated pattern. The correlation functions obey the same symmetry as the spin texture. Tuning chemical potential changes the pattern of the correlation functions and the correlation length. The correlation functions of the Weyl semimetal Fermi arcs and that from a Dirac semimetal show discrepancy.